Frontiers
n. 边界( frontier的名词复数 ); 边境; 开发地区的边缘; 尚待开发的领域
🗣️ 情景例句
As a matter of fact,
事实上，
Wine is mirror of the mind.
酒后吐真言。
She said she couldn't make up her mind. She said she would have to ask her future husband.
她说她还拿不定主意。她说她得问问她的未婚夫。